EP0762015B1 - Actuator - Google Patents

Actuator Download PDF

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Publication number
EP0762015B1
EP0762015B1 EP96113494A EP96113494A EP0762015B1 EP 0762015 B1 EP0762015 B1 EP 0762015B1 EP 96113494 A EP96113494 A EP 96113494A EP 96113494 A EP96113494 A EP 96113494A EP 0762015 B1 EP0762015 B1 EP 0762015B1
Authority
EP
European Patent Office
Prior art keywords
worm
wheel
additional gear
additional
actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96113494A
Other languages
German (de)
French (fr)
Other versions
EP0762015A1 (en
Inventor
Friedrich Dipl.-Ing. Obermeyer (Fh)
Alfred Conrad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0762015A1 publication Critical patent/EP0762015A1/en
Application granted granted Critical
Publication of EP0762015B1 publication Critical patent/EP0762015B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2015—Means specially adapted for stopping actuators in the end position; Position sensing means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2084—Perpendicular arrangement of drive motor to screw axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/209—Arrangements for driving the actuator using worm gears

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Gears, Cams (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Driven Valves (AREA)
  • Actuator (AREA)

Abstract

The position drive has an electric motor (5) which drives a displacement spindle coupled to a displacement element via a transmission contg. at least one worm (3) and worm wheel (2). The drive has an additional gear wheel (6) for measuring the movement of the displacement element. The additional wheel is driven by the worm. The additional wheel is a straight toothed star wheel with edge angle matching the axial modulus of the worm and is connected to an evaluation device (9), e.g. a potentiometer device, which detects its rotations.

Description

Die Erfindung betrifft einen Stellantrieb, mit einem elektrischen Antriebsmotor, der über ein aus mindestens einer Schnecke und einem Schneckenrad bestehendes Getriebe eine mit einem Verstellglied gekoppelte Verstellspindel antreibt, welcher Antrieb ferner ein Zusatzzahnrad zur Wegerfassung des Verstellgliedes aufweist.The invention relates to an actuator with an electric Drive motor that has one out of at least one Worm and a worm gear existing one with drives an adjusting spindle coupled to an adjusting element, which drive also an additional gear for path detection of Has adjusting member.

Ein solcher Stellantrieb ist durch die DE-A-36 15 285 bekannt. Bei diesem Antrieb ist am Außenumfang einer mit dem Schneckenrad drehfest verbundenen und die Verstellspindel aufnehmenden Spindelmutter ein zusätzliches Gewinde vorgesehen, über das ein zusätzliches Zahnrad angetrieben wird. Über dieses zusätzliche Zahnrad wird die jeweilige Betriebsstellung des mit der Verstellspindel als Verstellglied gekoppelten Ventils erfaßt.Such an actuator is known from DE-A-36 15 285. This drive has one on the outer circumference with the Worm gear rotatably connected and the adjusting spindle receiving spindle nut provided an additional thread, via which an additional gear is driven. over this additional gear becomes the respective operating position of the coupled with the adjusting spindle as an adjusting member Valve detected.

Der Erfindung liegt die Aufgabe zugrunde, einen Stellantrieb der gattungsgemäßen Art dahingehend zu verbessern, daß die Stellungserfassung des Verstellgliedes wesentlich genauer und mit weniger Elementen möglich ist.The invention has for its object an actuator to improve the generic type in that the Position detection of the actuator much more accurate and is possible with fewer elements.

Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, daß das Zusatzzahnrad direkt mit der Schnecke in Eingriff steht und von ihr angetrieben wird. Der Antrieb des Zusatzzahnrades durch die Schnecke hat erstens den Vorteil, das kein gesondertes Gewinderad vorgesehen werden muß und das zweitens das Zusatzzahnrad mit einer wesentlich höheren Drehzahl angetrieben wird, wodurch die Genauigkeit bei der Stellungserfassung ebenfalls erhöht wird.The problem is solved according to the invention in that the additional gear directly with the worm in Intervention stands and is driven by it. The drive of the First, the additional gear through the worm has the advantage that no separate thread wheel has to be provided and that second, the additional gear with a much higher one Speed is driven, which increases the accuracy at Position detection is also increased.

Gemäß einer Ausgestaltung der Erfindung ist das Zusatz zahnrad ein geradverzahntes Stirnrad, bei dem der Flankenwinkel der Zähne dem Axialmodul der Schnecke angepaßt ist. Damit ist die Stellungserfassung mit einem konstruktiv einfachen Element möglich.According to one embodiment of the invention, the additional gear a straight toothed spur gear in which the flank angle of the Teeth is adapted to the axial module of the worm. So that's it Position detection with a structurally simple element possible.

Erfindungsgemäß ist das Zusatzzahnrad mit einer seine Umdrehungen erfassenden Auswerteeinrichtung verbunden. Eine solche Auswertereinrichtung kann ein durch das Zusatzzahnrad verstellbares Potentiometer enthalten, durch dessen Stellung dann die jeweilige Betriebsstellung des Verstellgliedes in analoger Weise wiedergegeben wird. Es besteht aber auch die Möglichkeit mittels elektronischer Elemente die Auswertung auf digitaler Basis durchzuführen.According to the additional gear with one of its revolutions detecting evaluation device connected. Such Evaluation device can be an adjustable by the additional gear Potentiometer included, by its position then the respective operating position of the adjusting element in is reproduced in an analogous manner. But there is also Possibility of evaluation using electronic elements to be carried out on a digital basis.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird die Erfindung nachfolgend näher beschrieben. Es zeigen:

Fig. 1
einen Teilschnitt eines Stellantriebes
Fig. 2 und 3
jeweils ein von der Schnecke des Stellantriebes angetriebenes Zusatzzahnrad.
The invention is described in more detail below on the basis of an exemplary embodiment shown in the drawing. Show it:
Fig. 1
a partial section of an actuator
2 and 3
one additional gear driven by the worm of the actuator.

Mit 1 ist das Gehäuse eines Stellantriebes bezeichnet, in dem ein Schneckenrad 2 drehbar gelagert ist. Das Schneckenrad 2 ist in bekannter Weise mit einer auf einer Verstellspindel angeordneten Spindelmutter gekoppelt. Die Verstellspindel und die Spindelmutter sind in der Zeichnung nicht dargestellt. Durch die von dem Schneckenrad 2 angetriebene Spindelmutter wird die Verstellspindel und damit ein mit ihr verbundenes Verstellglied in axialer Richtung verstellt.1 with the housing of an actuator is designated in which a worm wheel 2 is rotatably mounted. The worm wheel 2 is in a known manner with one on an adjusting spindle arranged spindle nut coupled. The adjusting spindle and the spindle nut is not shown in the drawing. By the spindle nut driven by the worm wheel 2 becomes the adjusting spindle and thus one connected to it Adjustment element adjusted in the axial direction.

Der Antrieb des Schneckenrades 2 erfolgt mittels einer Schnecke 3, welche mit einem in der Zeichnung durch eine gestrichelte Umrißlinie angedeuteten Antriebsmotor 5 gekuppelt ist. The worm wheel 2 is driven by means of a Snail 3, which is indicated by a dashed line in the drawing Outline indicated drive motor 5 coupled is.

Der Schnecke 3 ist ferner ein Zusatzzahnrad 6 zugeordnet, welches mit seiner Welle 7 in einer Lagerstelle 8 des Gehäuses 1 drehbar gelagert ist. Die Welle 7 greift in das Gehäuse einer Auswerteeinrichtung 9 ein. In dieser Auswerteeinrichtung 9 werden die Umdrehungen des Zusatzzahnrades 6 in analoger oder digitaler Weise erfaßt und daraus entsprechende Steuersignale gebildet, durch die der Antrieb bei erreichen einer bestimmten Stellung stillgesetzt werden kann.The worm 3 is also assigned an additional gear 6, which with its shaft 7 in a bearing 8 of the housing 1 is rotatably mounted. The shaft 7 engages in the housing an evaluation device 9. In this evaluation device 9, the revolutions of the additional gear 6 in analog or recorded digitally and from it corresponding Control signals formed by which the drive can reach at a certain position can be stopped.

Wie aus den Figuren 2 und 3 zu ersehen ist, kann das Zusatzzahnrad 6 als einfaches geradverzahntes Stirnrad ausgebildet sein. Durch entsprechende Gestaltung der Zähne 10 und des Zahnabstandes 11 dieses Stirnrades kann dieses mit Schnecken 3 zusammenarbeiten, die unterschiedliche Mittensteigungswinkel 12 aufweisen. Damit können innerhalb eines bestimmten Bereiches des Mittensteigungswinkels 12 Zusatzzahnräder 6 in der gleichen Ausführungsform verwendet werden.As can be seen from Figures 2 and 3, the additional gear 6 designed as a simple spur gear be. By appropriate design of the teeth 10 and Tooth distance 11 of this spur gear can this with worms 3 work together, the different center pitch angle 12 have. It can be used within a certain Range of the central pitch angle 12 additional gears 6 in the same embodiment can be used.

Claims (3)

  1. Actuator, having an electric drive motor (5) which, by way of a gearing comprising at least one worm (3) and one worm wheel (2), drives an adjusting spindle coupled to an adjusting element, which drive furthermore has an additional gear wheel (6) for the displacement detection of the adjusting element, characterised in that the additional gear wheel (6) is directly engaged with the worm (3) and is driven thereby.
  2. Actuator according to claim 1, characterised in that the additional gear wheel (6) is a straight-tooth spur gear, in which the gearing angle of the teeth (10) matches the axial module of the worm (4).
  3. Actuator according to claim 1 or 2, characterised in that the additional gear wheel (6) is connected to an evaluating device (9) which detects its revolutions.
EP96113494A 1995-09-04 1996-08-22 Actuator Expired - Lifetime EP0762015B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19532589 1995-09-04
DE19532589 1995-09-04

Publications (2)

Publication Number Publication Date
EP0762015A1 EP0762015A1 (en) 1997-03-12
EP0762015B1 true EP0762015B1 (en) 1998-10-21

Family

ID=7771209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113494A Expired - Lifetime EP0762015B1 (en) 1995-09-04 1996-08-22 Actuator

Country Status (6)

Country Link
EP (1) EP0762015B1 (en)
JP (1) JPH09219956A (en)
KR (1) KR970017422A (en)
CN (1) CN1144890A (en)
AT (1) ATE172522T1 (en)
DE (1) DE59600699D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001069722A (en) * 1999-08-31 2001-03-16 Jidosha Denki Kogyo Co Ltd Motor fitted with rotation detecting sensor for switchgear
JP4633355B2 (en) * 2003-12-24 2011-02-16 株式会社ミツバ Linear actuator
US8322237B2 (en) * 2011-03-10 2012-12-04 General Electric Company Coupling for a position indication device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH668465A5 (en) * 1985-08-27 1988-12-30 Sulzer Ag A SHUT-OFF DEVICE WITH ACTUATOR, IN PARTICULAR FOR VALVES.

Also Published As

Publication number Publication date
EP0762015A1 (en) 1997-03-12
ATE172522T1 (en) 1998-11-15
KR970017422A (en) 1997-04-30
JPH09219956A (en) 1997-08-19
DE59600699D1 (en) 1998-11-26
CN1144890A (en) 1997-03-12

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